Spheronization, marumerization, pelletization and micropelletization all mean the same thing. The manufacture of products in small spheres (spheroids) for use in pharmaceutical (pharma) and catalyst industries. Within each batch the spheroids are of regular shape and size and are quite dense. The products produced by these processes can be called spheroids, spheres, micro-spheres, pellets, micro-pellets or pharmaceutical or catalyst pellets. All these terms refer to the same thing. The size range is normally from about 0.8 mm to about 1.5 mm in diameter although smaller and larger are possible they are less common. Granulation normally refers to the manufacture of irregularly shaped particles with a large size range included within the batch. Granulated materials are generally less dense.